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/*
* Clock Tick interrupt conexion code.
*
* COPYRIGHT (c) 1989-1997.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* Modified to support the MPC750.
* Modifications Copyright (c) 1999 Eric Valette valette@crf.canon.fr
*/
#include <bsp.h>
#include <rtems/bspIo.h>
#include <bsp/irq.h>
extern void clockOn(void*);
extern void clockOff (void*);
extern int clockIsOn(void*);
extern void Clock_isr(void);
static rtems_irq_connect_data clockIrqData = {BSP_PERIODIC_TIMER,
(rtems_irq_hdl)Clock_isr,
NULL,
(rtems_irq_enable)clockOn,
(rtems_irq_disable)clockOff,
(rtems_irq_is_enabled)clockIsOn};
int BSP_get_clock_irq_level(void)
{
/*
* Caution : if you change this, you must change the
* definition of BSP_PERIODIC_TIMER accordingly
*/
return BSP_PERIODIC_TIMER;
}
int BSP_disconnect_clock_handler (void)
{
if (!BSP_get_current_rtems_irq_handler(&clockIrqData)) {
printk("Unable to stop system clock\n");
rtems_fatal_error_occurred(1);
}
return BSP_remove_rtems_irq_handler (&clockIrqData);
}
int BSP_connect_clock_handler (rtems_irq_hdl hdl)
{
if (!BSP_get_current_rtems_irq_handler(&clockIrqData)) {
printk("Unable to get system clock handler\n");
rtems_fatal_error_occurred(1);
}
if (!BSP_remove_rtems_irq_handler (&clockIrqData)) {
printk("Unable to remove current system clock handler\n");
rtems_fatal_error_occurred(1);
}
/*
* Reinit structure
*/
clockIrqData.name = BSP_PERIODIC_TIMER;
clockIrqData.hdl = (rtems_irq_hdl) hdl;
clockIrqData.on = (rtems_irq_enable)clockOn;
clockIrqData.off = (rtems_irq_enable)clockOff;
clockIrqData.isOn = (rtems_irq_is_enabled)clockIsOn;
return BSP_install_rtems_irq_handler (&clockIrqData);
}
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